620554620 has 72 divisors (see below), whose sum is σ = 2021244624. Its totient is φ = 141840384.

The previous prime is 620554619. The next prime is 620554661. The reversal of 620554620 is 26455026.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102597 + ... + 108476.

It is an arithmetic number, because the mean of its divisors is an integer number (28072842).

Almost surely, 2^620554620 is an apocalyptic number.

620554620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620554620 is an abundant number, since it is smaller than the sum of its proper divisors (1400690004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620554620 is a wasteful number, since it uses less digits than its factorization.

620554620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211099 (or 211090 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 620554620 is about 24910.9337440410. The cubic root of 620554620 is about 852.9560835855.

The spelling of 620554620 in words is "six hundred twenty million, five hundred fifty-four thousand, six hundred twenty".